Mary J. Fidler, M.D.
NPI 1598960494ActiveIndividual· Internal Medicine, Medical Oncology· Chicago, IL
Internal Medicine, Medical Oncology (M.D.) in Chicago, Illinois, trained at Albert Einstein College of Medicine of Yeshiva University (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $3,613,959 for 822 claims, against $57,041 paid for services in 2024. Gilead Sciences, Inc. was the largest of 11 companies reporting payments in 2025, $29,719 in all, mostly consulting fees.
Overview
| NPI | 1598960494 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 19, 2007 |
| Last updated in NPPES | Apr 14, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 036-110775 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 191 |
|---|---|
| Services billed | 803 across 17 procedure codes |
| Paid by Medicare | $57,041 |
Part D prescriptions in 2024
| Prescriptions (claims) | 822 · 1,109 30-day fills |
|---|---|
| Patients | 155 |
| Total drug cost | $3,613,959 |
| Generic share | 61% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- Rush University Medical GroupChicago, IL · 1,551 clinicians
Hospital affiliations
- Copley Memorial HospitalAurora, IL
- Rush Oak Park HospitalOak Park, IL
- Rush University Medical CenterChicago, IL
Other facilities
- Accentcare Home Health of IllinoisHome health agency · Lombard, IL
- Home Health Advantage, IncHome health agency · Orland Park, IL
Industry payments (Open Payments)
- 2025$29,719 · 32 payments from 11 companies
- 2024$65,650 · 63 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $10,402 | 2 |
| Astrazeneca Pharmaceuticals LP | $5,897 | 13 |
| Regeneron Healthcare Solutions, Inc. | $3,886 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $2,960 | 2 |
| Novocure Inc. | $2,800 | 1 |
What the 2025 payments were for
- Consulting Fee$24,912 · 11 payments
- Honoraria$2,800 · 1 payment
- Food and Beverage$1,289 · 17 payments
- Travel and Lodging$717.22 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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